BCM-based active power factor correction circuit implementation - Power Circuit - Circuit Diagram

MOS power IC full range

Shunluo Inductance Power Inductor SWPA Series First Class Agent

KKST patch plug-in active passive crystal oscillator hot sale 24.576000MHZ

Abstract: This paper analyzes the topology structure and working mode of the rectifier circuit, discusses the selection basis of the key parameters of the rectifier circuit, and proposes the design method of the critical conduction mode (BCM) power factor correction Boost switching converter. The simulation results show that the critical conduction mode active power factor correction (APFC) circuit with MC33262 as the core can output a stable 400 V DC voltage in a wide voltage input range of 90-270 V, and the power factor is 0. .99, the system performance is superior, to meet the design requirements.
Keywords: active power factor correction (APFC); Boost converter; critical conduction mode (BCM); MC33262

1 Introduction Active power factor correction (APFC) is an important way to use electric energy efficiently and with low pollution. It is to add a power conversion circuit between the bridge rectifier and the output capacitor filter to make the power factor close. 1. The active power factor correction circuit works in the high-frequency switching state and has the characteristics of small size, light weight and high efficiency. It has become a new hot spot in the research of power electronics technology.

2 APFC working mode compares active power factor correction (APFC) circuits. According to whether the inductor current is continuous, its working mode can be divided into Continuous Conduction Mode (CCM), Discontinuous Conduction Mode (DCM) and There are three types of Boundary Conduction Mode (BCM). The characteristics of these three working modes are compared as shown in Table 1. The APFC circuit design in this paper adopts the working mode of BCM.

[3][4]